Known Issues

General

  • Firmware upgrade will not work when using USB 1.1 or USB 2.0 Full Speed. Until a fix is published in a future GNU Toolchain release, the workaround is to use a USB 2.0 host to perform the upgrade

  • When the AVR ONE! is connected to the target, but is not powered, it will passively load the RESET line. This may cause the target device to be held in reset unintentionally. Always power up the emulator when it is connected to a target device. The RESET will also be loaded slightly when performing a firmware upgrade, and when reconfiguring the FPGA when changing target family types. In some circumstances this may cause the target device to be reset.

  • Daisy chain auto detection won't work when an ATmega128 is a part of the daisy chain except if the ATmega128 is the first device in the chain. This is due to the JTAG instruction IDCODE not working correctly in this device. For more information see the Errata section in the ATmega128 data sheet.

  • The aWire interface will currently only communicate at 115200bps.